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(ModeL) I 2 Sheets-Sheet 1. R. KAMPFE.

MAGHINERY FOR GRINDING GU'JIILERY.

No. 364,353. Patented June 7, 1887.

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(Model.) 2 Sheets-Sheet 2. R. KAMPFE.

MACHINERY FOR GRINDING GUTLBRY.

No. 364,353. Patented June '7, 1887.

m .w N m 5% UNITED STATES PATENT OFFICE.

RICHARD KAMPFE, OF BROOKLYN, NEW YORK.

MACHINERY FOR GRINDING CUTLERY.

SPECIFICATION forming pent of Letters Patent No. 364,353, dated June 7,1887.

(ModcL) To aZZ whom it may concern.-

Be it known that I, RICHARD KAMPFE, a citizen of the United States,and-a resident of Brooklyn, in the county of Kings and State of NewYork, have invented certain new and useful Improvements in Machinery forGrinding Cutlery, of which the following is a specification.

My invention relates to machinery for grinding cutlery, and moreespecially razor-blades; and it consists partly of an in iproved devicefor automatically holding the blade to the grindstone, and partly of adevice adapted to impart to the blade while so held a desired motion andto automatically control said motion.

My invention is fully illustrated in the accompanying drawings, in theseveral figures.

of which like letters indicatelike parts.

Figure l is a sectional view showing the various parts of my inventionabove theline of the'supportingframe, said parts being shown as removedtherefrom and placed upon an independentbase, constituting no part of my.invention or apparatus. Fig. 2 is a top View of my invention, showingthe same arrangement as above, with the magnet-covering and the shieldremoved. Fig. 3 is a side view of my invention, and Fig. 4 is a frontView of my invention. Fig. 5 is a front view showing the Shield I cmploy to catch the water and debris thrown from the grindstone when inmotion. It shows also the plate which is screwed onto the face of theshield, whose office is to support the blade while the same is beingheld to the stone. This view shows also the grooved ends of the magneticbladeholder. Fig. 6 is a top view of a short section of my magneticblade-holder, showing the top edges of the grooves cut in the ends ofthe holder.

A is a grindstone.

B is a pulley mounted upon the shaft O, which is supported upon thestandards 0 O. The shaft 0 terminates in pointed bearings c c, whichimpinge against the blocks C. These latter are secured in horizontalposition in the upper end of the standards 0 by setscrews c c.

D is an oscillating frame carrying the two standards H H, which areprovided with pointed set-screwsi i, upon which the bed I, with itssuperincumbent slide-rest, is pivoted. J is a drippan, whose oflice isto catch the waste from the stone; K, a screen, whose'office is toprevent the water, debris, &o., from being thrown upon surroundingobjects.

L is a screw, whose office is to throw the blade holding and feedingparts of the machinery back or forward by raising or lower ing the farend of the bed I. This screw may engage an opening in the bed I andimpinge against the top of the frame D, or it may on gage an opening inthe frame and impinge against the lower side of the bed.

M is the stationary portion, and M the movable portion, of the lateralslide, and their office is, by the aid of the screw m, which turnsloosely in the movable portion M, and screws into a threaded hole, m inthe stationary portion M, to feed the blade across the face of thestone. The screw is operated by the hand wheel at. Usually this lateralslide will not be employed, and the feeding of the blade to and froacross the face of the stone will be done automatically by the operationof the oscillating frame, hereinafter explained; but there are timeswhen it is desirable to hold the blade in one place, or to present oneportion longer than the rest, and for this purpose the hand-feed isparticularly adapted.

N is the stationary and N the movable portion of the forward slide. Theoffice of this slide is to feed the blade against the stone. The slideis operated by the hand-wheel n and the screw or, which turns loosely inthe movable portion N and screws into at-hrcadcd hole in the stationaryportion N.

I? is my improved bladeholder, which is essentially a horscshoemagnet.The end of it is rounded to conform to the shape of a 1101- low-groundrazor. It should be of a thickness equal to the width of the blade. Itneed be, several magnets may be placed upon each other to make up thedesiredthickness. I11 this case a non-conductor will be placed betweenthem; but in the present instance I have shown but one magnet, which isof the required thickness. It is found desirable, also, to fill thecenter P between the ends of the arms with a non-conducto1x The magnetis seen red by the roc bolts q q onto abed, P, from which it is separated by a thickness of non-conducting material, p. The bed 1? is hungupon an axle, M, which isjournaled in any suitable manner in the slideN.

O is a covering of non-conducting material, which is placed upon themagnet. The bolts (1 g pass through this and secure it in position.

This covering is provided with the elevated portions 0 0, which aredrilled to admit the passage ofthe facing-tool B. By a proper adjustmentof the relative heights of the openings in 0 and o the facingtool isgiven the desired angle. The facing-tool consists of adiamond set in theend of a rod.

Q is a shield, whose office is to protect the slides, &e., and theperson operating the ma chine from the water and debris which is thrownoff from the grindstone when in motion. It is provided .with the openingQ, to permit the ends of the magnetic holder 1? to project through saidopening. The blade S is held firmly in position by the magnet, and theoperatorshands relieved from the duty of holding the blade. Increasedattraction between the holder and blade may be secured by the employmentof an eleetromagnet of suitable shape.

Q is a small plate which is screwed onto the face of the shield Q, andserves to inclose and support the blade when placed against the ends ofthe magnetic blade-holder. XVhen in this position, the back of the bladerests upon the bottom of the cut-away portion in the plate Q and itsends against the upright arms there of, as seen in Fig. 5, wherein ablade, S, is shown supported by the plate Q, the blade being partlybroken away. It will be understood that the recess in the plate Q, maybe made of any size desired.

E is a shaft having hearings in either side of the slide N, and carriesan eccentric, e, and

terminates in the double joint 6, by which it is connected to thetelescopic shaft E E, which in turn terminates in the double joint 0, bywhich it is connected with the shaft E, upon which is mounted the pulleye'.

F is a standard terminating in the bearings ff, which serve as a supportfor the shaft E.

The oscillating frame D is provided with a downwardlyextending arm, (I,having two longitudinal s1ots,.d d. S is a table or bench, by which theframe D is supported in the following manner: Thetop cross-bar of thebench in front is provided with a vertical slot, 61', normally oppositesaid slot d, and a stud, 8, extending through said slots, forms thepivot about which the arm d turns. Nuts 1! t on either end of the stud 8hold it in position, and the adjustment of the pivotal point may beregulated thereby. A shaft, S, is journaled in bearings t t of saidbench S*, and on the opposite ends of said shaft are keyed thecrank-wheel S and pulley S.

Upon the face of the eccentric is secured the stud s, which plays withinthe slot d.

The arm is firmly held from slipping off this stud by means of a nutscrewed thereonto.

My improved grinding machinery is operated as follows: The respectivepulleys, B,e, and S,are set in motion by connecting them withcorresponding pulleys upon suitable driving-shafts. The shaft 0 and itscorresponding driving-shaft are so arranged that the stone A is made torevolve toward the blade to be ground. The object and advantage of thisare, that the force of the stone is exerted to press the blade downwardand against its holder, whereas if the motion were in the contrarydirection the tendency would be to drag the blade upward and away fromits holder. The shaft E, carrying the eccentric 0, may revolve in eitherdirection. The office of the eccentric is to alternately raise and lowerthe bed P,and with it the blade-holder P. The objects and advantages ofgiving this up and-down motion to the blade are, that the debris fromthe stone is allowed to be washed out of the way more freely than wouldbe the case if the blade were held steady; secondly, this motion freesthe stone from many particles of sand, which, when detached, fallbetween the blade and stone and serve to increase the cutting quality ofthe stone, and at the same time the tendency of the blade to burn andthe stone to become polished at the point of contact is avoided. Again,if the blade is held still, the stone will grind it hollow, makingitthin in--the center and thick at the front and back edges. Even inhollow-ground blades it is desirable to have the blade fiat toward thefront edge, and this is accomplished bya careful adjustment of the bladeand stone with reference to their median lines-that is to say,

the higher the blade is raised with reference ICO to the median line ofthe stone the more the back of the blade is ground off, and vice versa.The adjustment is effected by raising or lowering the screw L, as may bedesired. Lastly, by this motion all the advantages are secured whichtrained grinders have found in keeping the blade in motion whenpresented to the stone. 'The double joints 0 e and telescopic shafting EE adjust themselves automatically to the changed positions of the slideN, within which the shaft E has its bearing, which result from theoperation of the hand-screws m and n. and the oscillating frame D andset-scrcw L. The respective male and female portions of the telescopicshaft E E are respectively provided with a feather and groove orequivalent device, to keep one from rotating upon the other. \Vhen theshaft S is set in motion, the crank-wheel S carries the lower end of thearm (I with it from side to side alternately. It will readily be seenthat as the lower end of the arm (2 is carried by the crank-wheel toeither side the head of the frame, with its superincumbent bed, slides,bladeholder, blade, &c., is swung to the opposite side and then back,and the line of motion described by the blade while being so carried isa segment of a circle, and the stone being in motion and the operationof grinding going on, the blade is ground to an edge on the arc of acircle struck from the stud s; and this does not at all interfere withthe operation ofgrinding the blade concave,which is going on at the sametime. The distance from the stud s to the middle line of the blade isthe measure of the radius of the circle described by the blade duringthe oscillation of the frame (I, and this may be regulated by settingthe stud 8 up or down. The frame d is not raised or lowered by settingthe stud. As the distance between the stud and blade is increased ordiminished so will the cuttingedge approach or recede from a straightline, since the greater the radius of the circle the less the curvatureof the are described by the blade. If it is desired to give the blade astraight edge, the pulley S is disconnected from the driving-shaft andthe blade is fed across the face of the stone by the operation of theslide M. The ends of the blade-holder are provided with a series ofperpendicular grooves. The object of these is to afford an avenue ofescape for the water and sand, which might otherwise lodge between theblade and holder and interfere with the magnetic attraction between thesame. Another advantage is, that the circulation of water back of theblade tends to keep it cool.

Having full y described my invention,what I claim is- 1. In a machinefor grinding razors, the combination of the shield Q, provided with anaperture, Q, the magnet P, the poles whereof are presented to saidaperture, the face-plate Q, secured to said shield for supporting saidmagnet, and the grindstone A, substantially as described.

2. In a machine for sharpening razors, the combination, with thegrindstone A, of the magnetic blade-holder P, said holder being providedwith vertical grooves on the ends of its poles, as and for the purposeset forth.

3. In a machine for sharpening razors, the combination, with thegrindstone A, of the magnetic blade-holdcr P, the bed P below and thecovering 0 above said magnet, respectively, and the bolts q, passingthrough said covering, bed,and magnet, for holding thelat-terin'place,substantially as described.

4. In a machine for grinding razors, the combination of the shield Q,provided with an aperture, Q, the magnet P, the poles whereof arepresented to said aperture, the face-plate Q, provided'with verticalarms at each end, secured to said shield and extending around threesides of said aperture, for the purpose j set forth, and the grindstoneA, substantially as described.

5. In a machine for grinding razors, the grindstone A, laterally andlongitudinally adjustable bed N, and a blade-holder pivotally attachedthereto at its rear end, in combina tion with the eccentric 0, locatedbetween said bed and holder, the shaft E, the telescopic shafts E E,having the double joints 6 e", 7

connecting said eccentric and shaft, and means for rotating said shaft,substantially as described.

6. In a machine for grinding razors, the bench S frame D, pivotedthereto near the top of said bench on a stationary pivot, and means foroscillating the frame at its lower end, in combination with the bedI,pivoted to the frame D near its rear end, the screw L in the front endof said bed, adapted to bear upon said frame, whereby these parts can beadjusted relatively, arazor-holder supported on said bed, and agrindstone supported on said bench, substantially as described.

7. In a machine for grinding razors, the

bench S the grindstone A, laterally and longitudinally adjustable bed NNM M I, frame D, to which said bed is pivoted near its rear end, screw Lin the front end of the bedpiece I, adapted tobear upon said frame,whereby thesepart-s can be adjusted relatively, said frame D beingpivoted to said bench near its top, means for oscillating the frame atits lowerend, and a blade-holder pivotally attached to said bed at itsrear end, in combination with the eccentric 0, located between said bedand holder, the shaft E", the telescopic shafts E E, having the doublejoint 0, connecting said eccentric and shaft, and means for rotatingsaid shaft, substantially as described.

8. In a machine for grinding razors, the bench S, frame D, pivotedthereto near the top of said bench on a stationary pivot, and means foroscillating the frame at its lower end, in combination with the bed I,pivoted to the frame D near its rear end, the screw L in the front endof said bed, adapted to bear upon said frame, whereby these parts can beadj usted relatively, a razor-holder pivoted to said bed near its rearend, the eccentric e, located between said bed and holder, the shaft E,the telescopic shafts E E, having the double joint 0, connecting saideccentric and shaft, and means for rotating said shaft, substantially asdescribed.

9. In a machine for grinding razor-blades, the combination, with agrindstone, of a longitndinally-adjustable and laterally-reciprocatingbed adjacent to said stone, a bladeholder pivoted on said bed at thatend of the blade-holder farthest from the rim of the stone, and aneccentric or cam for oscillating said holder, substantially as shown anddescribed.

Signed at New York, in the county of New York and State of New York,this 16th day of May, A. D. 1885.

RICHARD KAMPFE.

Witnesses:

G. H. WETJEN, D. KNABE.

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